Quarterly report pursuant to Section 13 or 15(d)

Significant Accounting Policies - Schedule of Anti-dilutive Securities Excluded from Computation of Loss Per Share (Detail)

v3.21.2
Significant Accounting Policies - Schedule of Anti-dilutive Securities Excluded from Computation of Loss Per Share (Detail) - shares
shares in Thousands
3 Months Ended 6 Months Ended
Jul. 31, 2021
Jul. 31, 2020
Jul. 31, 2021
Jul. 31, 2020
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]        
Anti-dilutive potentially outstanding common shares 1,628 2,461 1,836 1,108
Stock Options [Member]        
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]        
Anti-dilutive potentially outstanding common shares 1,453 2,314 1,671 967
Restricted Stock Units [Member]        
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]        
Anti-dilutive potentially outstanding common shares 113 65 124 58
Deferred Stock Units [Member]        
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]        
Anti-dilutive potentially outstanding common shares 62 82 41 82